SANDMARC Aqua Filter for GoPro Hero 4 and 3+ Cameras - Dive, Scuba and – NineCentral - United States
Diving Lens Filter Kit Compatible with GoPro Hero 4 Hero+ Hero and 3+ fits Standard Waterproof Housing Enhances Colors for Underwater Video and Photography Includes 5 Filters - Newegg.com
GoPro Hero4 Red Snorkel Filter - Walmart.com
Kitway Lens Color Filter for Gopro Hero 4 3+ Black 3-Pack Filters Red Magenta Snorkel Super Suit - China Action & Sports Gopro Camera Accessories and Housing Cover Waterproof for Gopro price